I just thought I'd throw this out in case any of you has ever had this happen to you. I have three large (about 80-85 lbs. dogs, all sisters). The other night I noticed that one of them was hardly able to move her rear legs. In the morning she was completely paralyzed. I took her to a vet and he gave her some medications, but there has been no difference. I ordered some other stuff off the internet and I will try it and see if it helps her. I read about ticks causing this problem so, I put some medicine on her coat, but I doubt that she has any. So, today I will build her a wheel chair. I think it bothers her to pee on herself, so I made a harness that I can hold her up while she relieves herself. It seems to me that her sisters are confused, they just don't understand what happened to their sister. I hate seeing here drag herself around, but when she makes up her mind about something, theres no stopping her. So. I have to run and get the harness to help her out.